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LMGHINEl FOR PULVBRIZING DRES.

Nm 10,567. y Patented Peb. 28, 1854.

2 Slmeias-Sli-eetA 2.

A. K. B'TG'N. MA'GHINEFOR PULVERIZING OB-BS.

ii rr A. K. EATON, or vNiiw roux, N. Y.`

MACHINE Fon runviimz,riverv omis.

T 0 all wiz-0m t may concern Be it known I, A. K. EATON, of the city,l

county, and State of New York, have invvented certain new and useful Improvements in Machinery for Pulverizing Orcs and Vhich Are Also Applicable to other Purposes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, in which- Figure l represents a view in perspective of one of the many forms in which my im proved pulverizer may be constructed; Fig. Q a side elevation of the same, showing in vertical section the pulverizing apparatus. My improved pulverizer combines the functions of the mortar and mill-stone in such manner as to render the thorough and fine pulverizing of the former compatible with the rapid and even working of the latter, whereby the work is done more thoroughly and with greater speed and economy of power than has heretofore been attained. The accompanying drawings represent a strong frame (A), in which a spindle (B), is supported in suitable bearings. This spindle is rotated in this example by means of a wheel (a), secured upon its lower end and which gears into another wheel (b), on the driving shaft (c), which may be driven by any convenient prime mover. On the middle of the spindle (B), a pulley (d), is mounted which transmits motion through a belt to a similar pulley (e), which gives motion to a counter shaft (D), on which the pulley is mounted. To the upper extremity of the spindle (B), a shallow vmortar or grinding dish is secured, which while the machine is in operation rotates constantly. The upper surface of this dish is a segment of the concave surface of a hollow sphere, whose center is the middle of an inverted step (a), secured to the underside of the upper bar of the fra-me.y This step consists of a tubular .flanged case (E) in the lower end of which the bearing slides, the

upper end being fitted with a screw follower (F), which may be turned up orl down to bear less or more upon a spring (s), inverted between the step and follower to regulate the pressure of the step downward for a purpose to be hereafter described, and also to permit it to yield. A thickrubbei- (G), rests upon and is fitted to the concave surface of the revolving mortar From the center of this rubber a stem (I), extends tremity is loosely fitted. The lower extremity of this stem with its rubber (G), is free to vibrate within ythe revolving dish,

which is about double the'diameter of the oscillating rubber, and since the radius and center of oscillation of the rubber (G), coin- :D sTATEsrATiiN-Tonricn upy tothe stepi(n) intoy which its upper exv cide with the radius and center of curvature carry its periphery beyond the inner side 1 of the iange (L), of the rotating dish. The rubber (G), must be guided in its oscillation so as to prevent it from being carried around by the dish. In this examplethis is effected by the stem (I), assing through `a slot (N), in the cross bar P), of the frame. Y

The dish (H), and the rubber (G), are made to press against eachother with a variable force during the' operation of grinding as the nature of the work may re-V quire by adjusting the follower (F),Yof the step; and in case of any hard substance."VV

which the rubber cannot crush getting between them, the step spring (s) will permit 9o Y from the dish to protect them from breakj the yielding or separation of the rubber age. c

The adjacent or grinding surfaces of the vibrating yrubber and rotating dish may be indented, grooved, or roughened, vor have,

cavities formed in them in any way 'the judgment of the constructor may deem ex-" pedient, or special circumstances show to be necessary; and in case grindingand amalgamation are conducted together as they cavity in the center of the dish (H), surf rounded by several other cavities, withV grooves connecting them should be made, or some other equivalent device adopted, in order to receive the mercury, and facilitate its contact with the ore. deemed advisable the rubber (G), can `be made to revolve as well as to oscillate bysimply mounting a pulley upon the stem,

If Y it should be losV l and connecting the shackle bar (J), to a Y sleeve on the stem (I), which will permit V" may be whenever it is thought advisable, a

the stem to rotate freely, at the same time,

that it will as efectually oscillate it as it 110W does. The rim (L), of the dish (H), may be made removable to facilitate repairs, or the removal of the rubber (Gr).

Whatl claim as my invention and desire to secure by Letters Patent is- A rotating dish or mortar to hold the ore to be puverzed, andthe Water, mercury, or other liquidswith Which it may be advisable subscribed my name.

to miX the same, in Combination with a vibrating rubber, or pestle which is made to traverse the bottom of the mortar, substantially as herein set forth.

' In testimony whereof, I have hereunto A. K. EATON. Witnesses PETER HANNAY, P. H. WATSON. 

